# Squarespace: Incident updated: Acuity Scheduling: Emergency Maintenance

**Summary:** _summary pending_
- Kind: Incident update · Label: not classified yet
- Changed: 2026-10-21 16:43 UTC · Detected: 2026-10-21 16:43 UTC
- [Source: https://stspg.io/26c769lrgynn](https://stspg.io/26c769lrgynn)
- [Company: Squarespace](https://rewindex.com/company/squarespace.md)
- Versions: before incident\_version:260/fl4sncpys0t6@f2df088d7c2c → after incident\_version:260/fl4sncpys0t6@fe59f7b792bc
- Change 3 of 4 for this incident

Incident page (full timeline): [Acuity Scheduling: Emergency Maintenance](https://rewindex.com/company/squarespace/incidents/fl4sncpys0t6.md)
## What changed

**1. Added: Update** (in_progress) · 2026-10-21 16:41 UTC

```diff
+ To protect your data, we've taken Acuity offline while we address PHP2SHELL, a critical security vulnerability rated 9.2 out of 10 for severity. It affects popular web software, including tools Acuity relies on, and by some estimates up to 70% of websites are exposed. We're moving as fast as we can. Part of the fix comes from the makers of that software, so as their patches are released, we deploy them, test them and confirm they've actually closed the gap. We'll bring Acuity back once that's done. We know how much you depend on us, and we're sorry for the disruption.  https://en.wikipedia.org/wiki/PHP2Shell
```

## History of this incident

| When (UTC) | Change | Label |
| --- | --- | --- |
| 2026-10-21 13:13 UTC | [Incident updated: Acuity Scheduling: scheduled maintenance](https://rewindex.com/change/r6634133c2acc94.md) |  |
| 2026-10-21 16:13 UTC | [Incident silently edited: Acuity Scheduling: Emergency Maintenance](https://rewindex.com/change/re8c9d894be1bfd.md) |  |
| 2026-10-21 16:43 UTC | Incident updated: Acuity Scheduling: Emergency Maintenance (this change) |  |
| 2026-10-21 17:13 UTC | [Incident updated: Acuity Scheduling: Emergency Maintenance](https://rewindex.com/change/r82f273325b4560.md) |  |

Previous: [change](https://rewindex.com/change/re8c9d894be1bfd.md) · Next: [change](https://rewindex.com/change/r82f273325b4560.md) · All Squarespace changes: [timeline](https://rewindex.com/company/squarespace/changes.md)
_Diff excerpts are shown on normalized text: dates, counters and tokens appear as ‹date›, ‹count›, ‹tok›; noise-only edits are hidden. Rewindex shows the changed passages, not a copy of the page._


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Canonical: https://rewindex.com/change/rb339717523b6fe · Markdown: https://rewindex.com/change/rb339717523b6fe.md · JSON: https://rewindex.com/api/v1/changes/rb339717523b6fe · Generated 2026-10-22T04:25:16.371Z